Laboratory products catalog. - Ahlstrom-Munksjö Laboratory Products Catalog Ahlstrom acquired...

Laboratory products catalog.

02 Laboratory Products Catalog

Ahlstrom acquired Sweden-based Munktell Filter AB and its holdings in Munktell & Filtrak GmbH, Filtres Fioroni SA, and Munktell Inc in October 2012. Through the transaction, Ahlstrom has strengthened our product portfolio in advanced filtration materials.

Ahlstrom offers equivalent products to many of the filter paper grades offered by Munktell. Our recommended equivalent is shown in the cross reference guide. Some Munktell paper grades are now also being offered by Ahlstrom. The page on which they appear is indicated in the table on page 4.

Additional Munktell paper grades may be available for special orders. Please contact customer service for details.

Custom Order and Product DevelopmentAhlstrom is recognized worldwide as a leading custom manufacturer and converter of filtration, absorbent and specialized web materials. Ahlstrom‘s technical staff will work with your research and development department to determine specific product needs and specifications. Products listed in this catalog represent the grades and sizes most commonly used in the laboratory market. Most Ahlstrom papers can be supplied in special sheet, roll or die-cut sizes. To obtain information on other sizes and grades, please contact your local distributor or Ahlstrom.

SamplesProduct samples are available, upon request, to assist you in determining the Ahlstrom grade that is most suited to your application. Please contact your local distributor or Ahlstrom Customer Service Department to obtain samples.

Ahlstrom is a well- known brand in the scientific community.We are a high performance materials company, partnering with leading businesses around the world to help them stay ahead. Our products are used in a large variety of everyday applications, such as filters, wallcovers, beverages and labels. In laboratories, we are known and recognized for providing superior service, reliability and high quality products.

Laboratory Products Catalog 03

DistributionAhlstrom products are available from a worldwide distributor network, carefully selected for their product knowledge and ability to provide you with the most efficient service possible. Our representatives can provide you with a comprehensive offering of Ahlstrom products. Ahlstrom customer service and technical service is also available to provide any information or assistance you may require.

Satisfaction GuaranteedIf you are dissatisfied with any grades, Ahlstrom will gladly work with you to attempt to solve your problem. If there is a quality issue with a product purchased within the past six months, and we fail to provide a solution, Ahlstrom will either send you a product replacement or issue a credit.

QualityAhlstrom’s continued commitment to our customers is supported through registered adherence to ISO 9001 standards.

Technical InformationThis catalog provides current and detailed technical information on the full line of scientific products manufactured and converted by Ahlstrom. It includes analytical filter papers; glass microfiber filters used in the laboratory; chromatography, electrophoresis and blotting grades; extraction thimbles; membranes and syringe filters for microfiltration; and several specialty products made for specialized applications.

Contents

Qualitative Filter Papers 05

Quantitative Filter Papers (Ashless and Low Ash) 08

Specialty Analytical Filter Paper 11

Glass Microfiber Filters 16

Micro-Quartz Fiber Filters 19

Chromatography, Electrophoresis and Blotting Paper 20

Micro Filtration Membranes and Syringe Filters 22

Specialty Products 24

04 Laboratory Products Catalog

Munktell Grade

Ahlstrom Grade

006 94

00A 74

00H 94

00K 74

00M 54

00R 54

no. 1 601

1F 601

no. 2 642

3 631

3 m/N 613

37/N 961

39/N 963

3hw 613

3m/N 613

3S/H 237

4b 613

6 962

6 S/N 961

17 961

41b 962

55/N 962

67/N 962

120H 610

150 642

151 243

190 page 14–15

191 page 14–15

194 page 14–15

195 8001

196 8002

292 601

293 610

388 55

389 55

390 75

391 95

392 75

*The comparative data included herein is based on publicly available information and/or Ahlstrom’s analysis and THE COMPARATIVE GRADES ARE NOT REPRESENTED OR WARRANTED TO BE EXACT FUNCTIONAL OR PERFORMANCE EQUIVALENTS. All users must make their own comparisons and determinations as to the suitability of any products for their intended end-use.

Munktell Grade

Ahlstrom Grade

393 95

480 page 14

601/N 909

1001 950

1002 909

1003 631

1288 631

1289 909

1290 950

1291 950

1293 610

1357 4002

1765 page 14–15

1766 page 14–15

BF1 601

BF2 238

BF3 222

C450 270

ET/401 7100

ET/MG160 page 24–25

ET/MK360 page 24–25

FN1 631

FN2 631

FN3 601

FN4 642

FN5 610

FN6 642

FN7a 237

FN8 222

FN30 243

FN100 238

Labsorb Polyshield

MG 550-HA 169

MGA 111

MGB 121

MGC 131

MGD 141

MGF 151

MK360 page 18

Ahlstrom – Munktell cross reference guide and index


Qualitative Filter PapersAhlstrom’s qualitative grades of filter paper are, by definition, recommended for use in analytical methods, which determine or identify particulate constituents of a mixture irrespective of the amount present. Qualitative filter papers are often used in routine separation work that still requires high purity and consistent performance.

Ahlstrom offers a complete range of low ash filter papers for general laboratory work that provides you with the correct combination of particle retention, filtration speed, loading capacity and wet-strength. All our qualitative grades consist of > 95% super refined α-cellulose and linter fibers.

Standard Grades (Non Wet-Strengthened) Standard qualitative filter papers are suitable for quadrant folded or gravity flow applications. These grades contain a high level of alpha-cellulose that provides high purity but will weaken when wet. The inherent strength of standard (untreated) grades does not pose a problem when they are used in routine quadrant folded applications. We do not recommend these grades for use in vacuum work or when wet handling is required.

Key features

— Qualitative analysis

— Low ash content 0.06%

— Untreated

— Consistent performance

— Wet-strengthened grades available

— Custom cut

— Bulk packaging

Ahlstrom 610: 1.5µm – Slow Speed This grade is a slow flowing filter designed to retain fine particles encountered in qualitative analysis. Ahlstrom 610 is widely used for water analysis, biological products and fine precipitates such as cold-precipitated barium sulfate. Ahlstrom 610 is also used in Buchner funnels and to clarify cloudy suspensions.

Ahlstrom 642: 2µm – Medium Speed This grade has finer particle retention than Ahlstrom 601 but with slightly lower filtration speed. Ahlstrom 642 also has higher absorption than Ahlstrom 601. It is used in general laboratory applications to retain particles above 2 µm in size. Ahlstrom 642 is also found in agricultural and environmental laboratories for plant growth trials, soil testing, and air analysis for monitoring specific contaminants and in the filtration of organic and sulfide precipitates.

Ahlstrom 601: 2.5µm – Medium Speed This grade covers a wide range of laboratory applications and is used for clarifying liquids and for rapid filtration of coarser precipitates such as lead sulfate, lead chromate, calcium oxalate, calcium carbonate, aluminum phosphate, barium carbonate and beryllium hydroxide. Ahlstrom 601 can be found in soil analysis, seed testing and in air pollution to collect dust-laden air and is also commonly used in the food industry to separate foodstuffs from associated liquid or extracting liquid.

06 Qualitative Filter Papers

Catalog numbers (100/box; items with grade numbers in bold are 50/box) *All circle diameters are in centimeters

Size* 237 601 609 610 613 615 617 631 642

2.5 2370-0250 6010-0250 6090-0250 6100-0250 6130-0250 6150-0250 6170-0250 6310-0250 6420-0250

4.25 2370-0425 6010-0425 6090-0425 6100-0425 6130-0425 6150-0425 6170-0425 6310-0425 6420-0425

4.7 2370-0470 6010-0470 6090-0470 6100-0470 6130-0470 6150-0470 6170-0470 6310-0470 6420-0470

5.5 2370-0550 6010-0550 6090-0550 6100-0550 6130-0550 6150-0550 6170-0550 6310-0550 6420-0550

7.0 2370-0700 6010-0700 6090-0700 6100-0700 6130-0700 6150-0700 6170-0700 6310-0770 6420-0700

9.0 2370-0900 6010-0900 6090-0900 6100-0900 6130-0900 6150-0950 6170-0900 6310-0900 6420-0900

11.0 2370-1100 6010-1100 6090-1100 6100-1100 6130-1100 6150-1100 6170-1100 6310-1100 6420-1100

12.5 2370-1250 6010-1250 6090-1250 6100-1250 6130-1250 6150-1250 6170-1250 6310-1250 6420-1250

15.0 2370-1500 6010-1500 6090-1500 6100-1500 6130-1500 6150-1500 6170-1500 6310-1500 6420-1500

18.5 2370-1850 6010-1850 6090-1850 6100-1850 6130-1850 6150-1850 6170-1850 6310-1850 6420-185

20.5 2370-2050 6010-2050 6090-2050 6100-2050 6130-2050 6150-2050 6170-2050 6310-2050 6420-2050

24.0 2370-2400 6010-2400 6090-2400 6100-2400 6130-2400 6150-2400 6170-2400 6310-2400 6420-2400

27.0 2370-2700 6010-2700 6090-2700 6100-2700 6130-2700 6150-0270 6170-2700 6310-2700 6420-2700

32.0 2370-3200 6010-3200 6090-3200 6100-3200 6130-3200 6150-3200 6170-3200 6310-3200 6420-3200

38.5 2370-3850 6010-3850 6090-3850 6100-3850 6130-3850 6150-3850 6170-3850 6310-3850 6420-3850

40.0 2370-4000 6010-4000 6090-4000 6100-4000 6130-4000 6150-4000 6170-4000 6310-4000 6420-4000

45.0 2370-4500 6010-4500 6090-4500 6100-4500 6130-4500 6150-4500 6170-4500 6310-4500 6420-4500

50.0 2370-5000 6010-5000 6090-5000 6100-5000 6130-5000 6150-5000 6170-5000 6310-5000 6420-5000

Typical grade propertiesStandard Grades

Retention in µm

Filtration Speed Herzberg sec/100mls

Filtration Speed Rapidity mls/min

Loading Capacity

Whatman Cross Reference

610 1.5 1724 4 Medium 5

642 2.0 229 30 Medium 2

601 2.5 124 55 Medium 1

237 3.0 114 60 Very High 3

609 4.0 98 70 Medium —

613 6.0 114 60 Medium Student Grade

631 10.0 34 200 High 4

615 25.0 29 235 High —

617 35.0 19 360 Very High —

Ahlstrom 237: 3µm – Medium Speed This high absorbency grade is twice as thick as grade 642 with similar particle retention. The superior absorbency offers excellent performance when used as a sample carrier. The extra thickness gives higher wet strength and loading capacity, enabling more precipitate to be held without clogging the filter. Ahlstrom 237 is also highly suitable for use in Buchner funnels and for dye filtration.

Ahlstrom 609: 4µm – Medium Speed This grade is an evolution of Ahlstrom 613 for use in the beer industry. This is a filter paper with an extremely low iron and nitrogen content for the analysis of protein in beer.

Ahlstrom 613: 6µm – Medium Speed This is a strong filter paper with a medium flow rate and retention. Ahlstrom 613 is commonly used in student laboratories. This strong general-purpose filter is also useful in Buchner funnels for barium carbonate, lead chromate and beryllium hydroxides.

Ahlstrom 631: 10µm – Medium Speed This grade is used for the filtration of coarse particles and gelatinous precipitates such as ferric aluminum and magnesium hydroxides. Ahlstrom 631 is used in air monitoring and gas filtration when high flow rate is needed. This grade is also found in routine cleanup analysis of insoluble liquids such as biological fluids and organic elements.

Ahlstrom 615: 25µm – Fast Speed This fast filtering grade is an intermediate grade between Ahlstrom 617 and Ahlstrom 631. Ahlstrom 615 has a rough surface and is used for filtering aluminum, ferric and magnesium hydroxides. It is also found in general construction filtration work and in the filtration of insoluble iron and ore.

Ahlstrom 617: 35µm – Fast Speed This is an extremely fast filtering grade and has a larger particle retention than Ahlstrom 631. Ahlstrom 617, a thicker filter paper with higher loading capacity, is used for rapid filtration of coarse particles and gelatinous precipitates such as in oils and resin solutions. Ahlstrom 617 is also found in construction product testing and is used by students to retain large flocculents and precipitates.

Non Wet-Strengthened Grades (Continued)


Catalog numbers (100/box; items with grade numbers in bold are 50/box) *All circle diameters are in centimeters

Size* 950 909 962 961

4.25 9500-0425 9090-0425 9620-0425 9610-0425

4.7 9500-0470 9090-0470 9620-0470 9610-0470

5.5 9500-0550 9090-0550 9620-0550 9610-0550

7.0 9500-0700 9090-0700 9620- 0700 9610-0700

9.0 9500-0900 9090-0900 9620-0900 9610-0900

11.0 9500-1100 9090-1100 9620-1100 9610-1100

12.5 9500-1250 9090-1250 9620-1250 9610-1250

15.0 9500-1500 9090-1500 9620-1500 9610-1500

18.5 9500-1850 9090-1850 9620-1850 9610-1850

20.5 9500-2050 9090-2050 9620-2050 9610-2050

24.0 9500-2400 9090-2400 9620-2400 9610-2400

27.0 9500-2700 9090-2700 9620-2700 9610-2700

32.0 9500-3200 9090-3200 9620-3200 9610-3200

38.5 9500-3850 9090-3850 9620-3850 9610-3850

40.0 9500-4000 9090-4000 9620-4000 9610-4000

45.0 9500-4500 9090-4500 9620-4500 9610-4500

50.0 9500-5000 9090-5000 9620-5000 9610-5000

Typical grade propertiesWet-Strength Grades

Retention in µm



Loading Capacity


950 2.0 491 14 Medium 6

909 3.0 105 65 Medium 91

962 27.0 28 245 High 114

961 40.0 19 360 Very High 113

Ahlstrom 950: 2.0µm – Slow Speed This slow flow rate grade with very good retention is used in the filtration of fine precipitates and super phosphates. Ahlstrom 950 is also recommended for boiler water analysis applications and gas filtration.

Ahlstrom 909: 3.0µm – Medium Speed This medium flow rate grade with very good retention is a tighter version of Ahlstrom 962. This grade has a rough surface and is often found in the food industry for routine tests.

Ahlstrom 962: 27µm – Fast Speed This fast filtering grade is a thinner version of Ahlstrom 961. Ahlstrom 962 is recommended for the filtration of coarse and gelatinous precipitates. The creped surface of Ahlstrom 962 also offers higher surface area to maintain high filtration speed.

Ahlstrom 961: 40µm – Fast Speed This fast filtering grade, with extremely high loading capacity, is recommended for the filtration of coarse and gelatinous precipitates. The creped surface of Ahlstrom 961 also offers higher surface area to increase filtration speed.

Wet-Strengthened Grades

08 Quantitative Filter Papers (Ashless and Low Ash)

Quantitative Filter Papers (Ashless and Low Ash)Ahlstrom manufactures a series of extremely high purity, acid washed filter papers designed for use in analytical and gravimetric analysis. The quantitative grades are manufactured from top quality cotton linters using ultra-pure, reverse-osmosis water and are further treated with dilute acid to remove any remaining organic and inorganic impurities. All quantitative grades are manufactured in a strictly controlled environment that ensures high uniformity and high purity from filter to filter.

Key features

— Quantitative analysis

— Acid-wash treated

— High wet-strength


— Hardened grades available

— Custom cut

— Bulk packaging

Quantitative Filter Papers (Ashless and Low Ash) 09

Ahlstrom 95: 1.5µm – Slow SpeedThis is an extremely fine retention filter for critical gravimetric analysis and metal determination of very fine particles such as barium and lead sulfates, stannic and nickel sulfide, calcium oxalate and calcium fluoride.

Ahlstrom 75: 2.0µm – Medium SpeedThis grade has medium flow rate and good particle retention and is most commonly used for applications requiring high chemical resistance to strong acid and alkali. Ahlstrom 75 is often used for filtering trace elements, collecting hydroxides after precipitation by strong alkalis and in the analysis of metals in acid and alkali solutions.

Ahlstrom 55: 15µm – Fast Speed

This is a fast filtering grade for gravimetric analysis of coarse particles and gelatinous precipitates (i.e.: aluminum and zirconium hydroxides) in acid and alkali solutions. Ahlstrom 55 is also used in air and foodstuffs analysis and for chloride and phosphorous in cement, coal and coke.

Hardened Ashless Grades (Ash 0.006%)These specially treated hardened ashless grades are available for critical quantitative analytical techniques requiring increased wet-strength and handling capacity. These high purity filter papers have a tough, smooth surface free of loose fibers and are ideal for collecting wet precipitates. Each grade offers a convenient combination of particle retention and flow rate and are generally used because of their high chemical resistance to strong acid and alkali.

Ahlstrom 94: 1.5µm – Slow SpeedThis is an extremely fine retention filter for critical gravimetric analysis of very fine particles such as barium and lead sulfates, stannic and nickel sulfide, calcium oxalate and calcium fluoride.

Ahlstrom 74: 2.0µm – Medium SpeedThis grade has medium flow rate and good particle retention and is the most commonly used acid-washed filter. Ahlstrom 74 covers a wide range of general ashless filtration applications. It is used for gravimetric analysis of numerous components (e.g.: cements, copper, clay, bismuth, silicon, iron) found in heavy industries such as construction, mining or steel. Ahlstrom 74 is also used as a high purity filter for speedy filtering of trace elements such as silver chromate, lead sulfate, zinc and ammonium hydroxides. Ahlstrom 74 is also found in general soil analysis for separating solid from aqueous extracts.

Ahlstrom 54: 10µm – Fast Speed This is a fast filtering grade for rapid filtration of coarse particles and gelatinous precipitates such as iron, zirconium and aluminum hydroxides, and cobalt sulfide. Ahlstrom 54 is also used in air pollution testing to determine gaseous compounds. It is recommended for fast analysis procedures for unstable precipitates such as silicon, which requires speedy filtration.

Ashless Grades (Ash 0.007%)These standard ashless grades are suitable for both gravimetric analysis and sample preparations where a high-purity filter is preferred in the preparation of samples for use in analysis involving instrumental techniques.

Ahlstrom 391: 2-3 µm – Slow Speed This is a fine retention filter for gravimetric analysis of very fine particles such as barium and lead sulfates, stannic and nickel sulfide, calcium oxalate and calcium fluoride.

Ahlstrom 392: 5-8 µm – Medium SpeedThis grade has a medium flow rate and good particle retention and can be used for a wide variety of applications that require a lower ash content than standard qualitative grades, including gravimetric analysis of components in heavy industry.

Ahlstrom 388: 12-15 µm – Fast Speed This fast filtering grade is recommended for the filtration of coarse and gelatinous precipitates for gravimetric analysis.

10 Quantitative Filter Papers (Ashless and Low Ash)

Catalog numbers (100 circles/box) *All circle diameters are in centimeters

Size* 54 55 74 75 94 95 388 391 392

4.25 0540-0425 0550-0425 0740-0425 0750-0425 0940-0425 0950-0425 3880-0425 3910-0425 3920-0425

4.70 0540-0470 0550-0470 0740-0470 0750-0470 0940-0470 0950-0470 3880-0470 3910-0470 3920-0470

5.50 0540-0550 0550-0550 0740-0550 0750-0550 0940-0550 0950-0550 3880-0550 3910-0550 3920-0550

7.00 0540-0700 0550-0700 0740-0700 0750-0700 0940-0700 0950-0700 3880-0700 3910-0700 3920-0700

9.00 0540-0900 0550-0900 0740-0900 0750-0900 0940-0900 0950-0900 3880-0900 3910-0900 3920-0900

11.00 0540-1100 0550-1100 0740-1100 0750-1100 0940-1100 0950-1100 3880-1100 3910-1100 3920-1100

12.50 0540-1250 0550-1250 0740-1250 0750-1250 0940-1250 0950-1250 3880-1250 3910-1250 3920-1250

15.00 0540-1500 0550-1500 0740-1500 0750-1500 0940-1500 0950-1500 3880-1500 3910-1500 3920-1500

18.50 0540-1850 0550-1850 0740-1850 0750-1850 0940-1850 0950-1850 3880-1850 3910-1850 3920-1850

24.00 0540-2400 0550-2400 0740-2400 0750-2400 0940-2400 0950-2400 3880-2400 3910-2400 3920-2400

27.00 0540-2700 0550-2700 0740-2700 0750-2700 0940-2700 0950-2700 3880-2700 3910-2700 3920-2700

32.00 0540-3200 0550-3200 0740-3200 0750-3200 0940-3200 0950-3200 3880-3200 3910-3200 3920-3200

40.00 0540-4000 0550-4000 0740-4000 0750-4000 0940-4000 0950-4000 3880-4000 3910-4000 3920-4000

Typical grade properties Grades

Retention in µm



Loading Capacity


391 2-3 1200 7 Medium 50

392 5-8 300 33 Medium 52

388 12-15 40 267 Medium 54

94 1.5 1724 4 Medium 42

74 2.0 229 30 Medium 40

54 10.0 34 200 Medium 41

95 1.5 458 15 Medium 542

75 2.0 149 45 Medium 540

55 15.0 31 220 Medium 541

Low Ash Grade (Ash 0.01%)These hardened low ash grades have an intermediate ash content between standard qualitative grades and ashless grades. They are suitable for routine gravimetric analysis and typical preparation of samples for use in analysis involving instrumental techniques.


Specialty Analytical Filter PaperAhlstrom manufactures high quality analytical filter papers for use in specialty end use applications. These custom designed qualitative grades are manufactured from top quality cotton linters using ultra-pure, reverse-osmosis water. Ahlstrom specialty analytical filter papers include pleated and non-pleated grades and are found in applications such as seed, asphalt and beer testing. All grades are manufactured in a strictly controlled environment that ensures high uniformity and high purity from filter to filter.

Key features


— Low ash content 0.06%

— Untreated


— Wet-strengthened grades available

— Custom designed for end-use application

— Custom cut

— Bulk packaging

12 Specialty Analytical Filter Paper

Asphalt Testing Filter Paper Ahlstrom manufactures a range of high purity analytical paper for use in asphalt testing. Grade 627 combines good retention (4 µm) with a moderate flow rate. Other grades commonly used for asphalt testing in extraction units include 613, 615 and 617. They are available in solid circles, circles with precut center holes, sheets and rolls. Sheets and circles are shrink-wrapped in packs of 100 for protection from moisture and dust.

Typical grade properties *All grades available in custom cut dimension

Grades

Retention in µm



Loading Capacity

627* 4 80 85 High

613* 6 114 60 Medium

615* 25 29 235 High

617* 35 19 360 Very High

Pleated (Fluted) Filter Paper Ahlstrom offers a full range of standard pleated grades that meet your needs from grades with rapid flow rates for filtration of viscous materials to grades with tight matrices for removal of fine precipitates. Ahlstrom’s pre-pleated grades can save valuable time and maximize the efficiency of the laboratory filter system. Pleating improves the effective surface area increasing flow rate and loading capacity thus decreasing filtration time. Pleated circles are available in 12.5cm to 50cm diameters.

Catalog numbers Pleated (Fluted) Grades (100/box); items with grade numbers in bold are 50/box *All circle diameters are in centimeters

Size* 505 509 513 515 517 542 550 519 562

12.5 5050-1250 5090-1250 5130-1250 5150-1250 5170-1250 5420-1250 5500-1250 5190-1250 5620-1250

15.0 5050-1500 5090-1500 5130-1500 5150-1500 5170-1500 5420-1500 5500-1500 5190-1500 5620-1500

18.5 5050-1850 5090-1850 5130-1850 5150-1850 5170-1850 5420-1850 5500-1850 5190-1850 5620-1850

24.0 5050-2400 5090-2400 5130-2400 5150-2400 5170-2400 5420-2400 5500-2400 5190-2400 5620-2400

32.0 5050-3200 5090-3200 5130-3200 5150-3200 5170-3200 5420-3200 5500-3200 5190-3200 5620-3200

38.5 5050-3850 5090-3850 5130-3850 5150-3850 5170-3850 5420-3850 5500-3850 5190-3850 5620-3850

50.0 5050-5000 5090-5000 5130-5000 5150-5000 5170-5000 5420-5000 5500-5000 5190-5000 5620-5000


Filter paper base

Retention in µm



Loading Capacity

542 642 2 229 30 Medium

550 950 2 491 14 Medium

519 909 3 105 65 Medium

509 609 4 85 80 Medium

513 613 6 114 60 Medium

515 615 25 29 235 High

562 962 27 28 245 High

505 905 28 26 265 Medium

517 617 35 19 360 Very High


Beer Testing Filter Paper Ahlstrom manufactures a full range of laboratory filter paper for use in the beer industry. Ahlstrom 642 is recommended for the WORT color test. Ahlstrom 515 is a pleated filter used in the SCABA analyzer, while Ahlstrom 509, also pleated, is used in the IBU test and in Malt-4 analysis and degassing. Ahlstrom 111, a 100% glass microfiber filter is also used in the beer industry to remove yeast cells before analysis (see glass microfiber section).


Grades

Retention in µm



Loading Capacity

642 2 229 30 Medium

509 4 85 80 Medium

515 25 29 235 High

Sugar Testing Filter PaperAhlstrom offers a full range of specially designed filter paper for use in the sugar industry. Ahlstrom 8613 has a smooth black finish designed for use in applications requiring visual examination of particles. Ahlstrom 613 and 615 are particularly well suited for general laboratory filtration methods and qualitative analysis.


Retention in µm



Wet Burst Inches

Loading Capacity

8613 4 118 58 29 Medium

613 6 114 60 16 Medium

615 25 29 235 18 High

962 27 28 245 126 High

961 40 19 360 70 Very High

Catalog numbers Sugar Testing Grades (8613 and 962: 100/pk; 961: 50/pk)

*All circle diameters are in centimeters. Grade 613 and 615 catalog numbers are shown in the Qualitative Filter Paper section.

Size* 8613 962 961

2.4 8613-0240 9620-0240 9610-0240

3.0 8613-0300 9620-0300 9610-0300

4.25 8613-0425 9620-0425 9610-0425

4.7 8613-0470 9620-0470 9610-0470

5.5 8613-0550 9620-0550 9610-0550

7.0 8613-0700 9620-0700 9610-0700

9.0 8613-0900 9620-0900 9610-0900

11.0 8613-1100 9620-1100 9610-1100

12.5 8613-1250 9620-1250 9610-1250

15.0 8613-1500 9620-1500 9610-1500

18.5 8613-1850 9620-1850 9610-1850

14 Specialty Analytical Filter Paper

Pulp & Paper Blotting PaperAhlstrom 240 and 623 are blotting papers manufactured for use in the pulp and paper industry. Ahlstrom 240 is recommended for TAPPI T-205 and T-491 test methods. Ahlstrom 623 is also a very popular grade used for long-fiber hand sheet applications. Grade 623 absorbs more water at a faster rate.

Typical grade propertiesGrades Base Weight g/m2 Total Absorbency g/m2 Absorbency Rate Sec/1ml H2O

240 249 598 13

623 246 740 5

Catalog numbers Pulp and Paper Blotting Grades

Size* 240 Shts/ctn

8 x 8 2400-0808 2250

24.5 x 24.5 2400-2424 250

Seed Testing PaperAhlstrom manufactures grades of non-toxic paper for use in the seed testing industry and in agricultural research laboratories. These grades meet ASTM designation D1030-75 and T406-SU-72. Most are available in sheets, circles, and rolls.Grades 8001 and 8002 are thin, tan, creped towels primarily used in seed germination. Grade 8002 is approximately twice as heavy as grade 8001 and will therefore

hold a greater volume of liquid. We offer two products in pleated strips. Grades 1765 and 1766 are mid-weight papers provided in double pleated format. 1765 is a white paper most useful for pelleted, medium, and large seeds. 1766 is tinted grey to improve visibility of seed with fine roots.For blotter sheets we recommend grade 939, a soft white paper with a coarse surface, or, for greater visibility of tiny

germinating roots, one of our grades of colored blotter papers. Grade 628 is a naturally colored tan paper with a firm hard finish. Grade 190 is of similar weight and tinted blue. Grade 191 and 194 are twice as heavy as grade 190 and grade 194 is a darker shade of blue. Grade 601 is a smooth white paper particularly suited for use in fluorescent testing applications.


Grades Surface ColorBasis Weight (g/m2)

Klemm (Capillary Rise)1/16th in/min

190* Smooth Blue 300 16

191* Smooth Blue 700 14

194* Smooth Dark Blue 720 36

601* Smooth White 88 13

628* Smooth Tan 337 19

939* Unfinished White 140 55

1765 Unfinished White 120 Available Pleated Only

1766 Unfinished Gray 120 Available Pleated Only

8001* Crepe Tan 63 13

8002* Crepe Tan 120 12

Phase Separation Filter Paper Ahlstrom 480 is a hydrophobic silicone-impregnated paper intended for phase separation.

Catalog numbers (100 circles/box)

Size* 480

7.0 4800-0700

9.0 4800-0900

11.0 4800-1100

12.5 4800-1250

Size* 480

15.0 4800-1500

18.5 4800-1850

24.0 4800-2400

*All circle diameters are in cm.

*All sizes are in inches.

Size* 623 Shts/ctn

8 x 8 6230-0808 2000

12 x 12 6230-1212 800

Special Analytical Filter Paper 15

Size* Catalog Number

4-1/8 x 4-1/8 9390-0004

4-5/16 x 4-5/16 9390-0007

4-7/8 x 5 9390-0005

5 x 5 9390-0505

5 x 7 9390-0507

9 x 10 9390-0910

10 x 18 9390-1018

17-1/2 x 19 9390-0009

18-1/2 x 19-1/2 9390-0006

21-1/8 x 24-1/4 9390-0008

Non-Toxic Pleated Strips 2000 x 110mm 50 double pleats (1000/pk)

Grade Color Catalog Number

1765 White 1765-1150

1766 Grey 1766-1150


3-1/4 x 3-1/4 6280-0001

3-1/2 x 3-1/2 6280-0008

3-1/2 x 4 6280-0009

3-1/2 x 5-3/4 6280-0004

3-3/4 x 5-1/8 6280-0003

4 x 4 6280-0404

4-1/8 x 4-1/8 6280-0002

4-1/2 x 16 6280-0010

4-5/8 x 4-5/8 6280-0012

4-3/4 x 5-1/4 6280-0006

4-3/4 x 6 6280-0007

4-7/8 x 5 6280-0005

5 x 5 6280-0505

6 x 9 6280-0609

6 x 9.5 6280-0695

9 x 12 6280-0912

9-1/2 x 12 6280-9512


3-1/4 6280-0325

3-1/2 6280-0350

5-1/4 6280-0525

5-1/2 6280-0550

Grade 628 Circles (1000/pk) *All diameters are in inches.

Non-Toxic Unbleached Blotter for Seed Testing Grade 628 Sheets (1000/pk) *All sizes are in inches.

Size** Catalog Number

8.5 6280-0850

9.0 6280-0900

11.0 6280-1100

13.5 6280-1350

Grade 628 Circles (1000/pk) **All diameters are in centimeters.

Non-Toxic Brown Towels for Seed Testing (1000/pk) *All sizes are in inches.

Size* 8001 regular weight 8002 heavy weight

9 x 18 8001-0918 --

9-1/2 x 12 8001-0003 --

10 x 12 8001-1012 --

10 x 15 8001-1015 8002-1015

10 x 20 8001-1020 8002-1020

10 x 30 8001-1030 8002-1030

12 x 15 8001-1215 --

12 x 16 8001-1216 --

12 x 18 8001-1218 8002-1218

15 x 30 8001-1530 8002-1530

Non-Toxic White Filter – for Fluorescent Testing Grade 601 (1000/pk) *All sizes are in inches.


5 x 5 6010-0505

6 x 9 6010-0609

6 x 18 6010-0618

6-1/2 x 10 6010-0610

10 x 15 6010-1015

14 x 19 6010-1419Size* Pack Size Catalog Number

12.7 x 12.0 1000/pk B190-1212

15.0 x 31.0 sheet 1000/pk B190-1531

8.26** 5000/pk B190-0826

Grade 191 Circles (1000/pk) *All diameters are in centimeters.


8.50 B191-0850

9.0 B191-0900

Grade 194 (1000/pk) *All sizes are in centimeters. ** All diameters are in centimetres.


10.2 x 10.2 B194-0404

12.0 x 11.9 B194-1219

12.7 x 12.7 B194-0505

5.0** B194-0500

13.0** B194-1300

Non-Toxic Blue Blotter for Seed TestingGrade 190 *All sizes are in centimeters. ** Diameter is in centimetres.

Non-Toxic White Blotter – High AbsorbencyGrade 939 (1000/pk) *All sizes are in inches.

Additional sizes available upon request. Please contact customer service for details.

16 Glass Microfiber Filters

Glass Microfiber FiltersAhlstrom offers a full range of glass microfiber filters manufactured from 100% pure borosilicate glass. Because of their intrinsic properties, glass microfiber filters have wide applications in many areas of laboratory analysis, especially when fine filtration and high loading capacity is required. Applications for Ahlstrom glass microfiber filters include environmental analysis for water, wastewater, testing of soils, air pollution and monitoring, research and process biochemistry, and gravimetric analysis involving ignition of samples. Ahlstrom glass microfiber filters are also found in the filtration of hot gases and liquids, and in pre-filtration.

Key features


— Laboratory analysis

— 100% pure borosilicate glass

— Rapid flow rate

— Fine particle retention 0.7µm – 3.1µm

— High loading capacity

— Chemical and thermal resistance (up to 500°C)

— Long shelf life

— Brilliant white color reflecting more than 96% of visible light

— Custom cut

Glass Microfiber Filters 17

Standard Glass Microfiber Filters Standard glass microfiber filters contain no binders or other additives that may cause interference to sensitive enzymatic or other chemical reactions. The unique characteristics of glass microfiber filters make its use particularly advantageous to laboratory filtration by enabling fast filtration of large volumes and difficult solutions without premature clogging.

Ahlstrom 151: 0.7µm – Slow Speed This high performance grade is designed to retain extremely fine particles down to 0.7 µm. Ahlstrom 151 has retention comparable to membrane filter while providing higher flow and loading capacity. Ahlstrom 151 is recommended for filtering fine precipitated proteins. In the filtration of nucleic acids and difficult biochemical solutions, Ahlstrom 151 is used in combination with Ahlstrom 141 as a highly efficient protective and retentive pre-filter to extend the loading capacity of membrane filters. Grade 151 is recommended for use in TCLP procedure as described in test methods for evaluating solid wastes, EPA method 1311.

Ahlstrom 121: 1.0µm – Medium Speed This very thick grade offers finer particle retention than Ahlstrom 111 with high wet strength and loading capacity. Ahlstrom 121 is recommended for the clarification of liquid suspensions loaded with fine particulates. Ahlstrom 121 is also used in membrane pre-filtration and is also found in quantification of solids, and LSC (Liquid Scintillation Counting) techniques that require high loading capacity.

Ahlstrom 131: 1.0µm – Medium Speed This standard grade found in many environmental applications offers slightly more retention than Ahlstrom 111 with slightly lower filtration speed and loading capacity. Ahlstrom 131 is recommended for the collection of suspended solids in potable water and in industrial wastes. In biochemical tests, Ahlstrom 131 is suited for cell harvesting, liquid scintillation counting and the analysis of carbohydrates. Ahlstrom 161: 1.1µm – Medium Speed This popular grade offers finer particle retention and higher flow rate than traditional analytical filter papers. Ahlstrom 161 is used in general laboratory applications, cell harvesting, liquid scintillation counting, and in the monitoring of air and water pollution. Ahlstrom 161 is generally recommended for water pollution monitoring techniques for total suspended solids.

Ahlstrom 169: 1.0µm – Fast Speed This glass microfiber grade is a smooth surface, binder-free filter with unique high temperature resistance. It offers fine particle retention and product stability to over 500 degrees Centigrade. The

temperature resistance makes Grade 169 well-suited for TCLP test methods, suspended solids determination, volatile solids testing, air pollution testing, and related EPA and ASTM protocols.

Ahlstrom 111: 1.2µm – Fast Speed This grade offers fine particle retention with high filtration speed and good loading capacity. Ahlstrom 111 is used in general laboratory filtration including atmospheric and water pollution monitoring such as intake controls, ozone-level, and water effluents. Grade 111 is also well suited for filtration of water and protein, testing of algae, bacteria cultures and for radioimmunoassay with weak beta emitters. Ahlstrom 111 is also recommended for filtering solvents in a high-resolution laboratory.

Ahlstrom 141: 3.1µm – Fast Speed This grade offers better filtration speed and a higher loading capacity than an analytical filter paper of similar particle retention. Ahlstrom 141 is particularly recommended for pre-filtration of membrane filters and is also used in combination with Ahlstrom 121 as a highly efficient protective and retentive grade density pre-filter for membrane filters.

Catalog numbers (100 circles/box) *All circle diameters are in centimeters

Size* 111 121 131 141 151 161 169

2.1 1110-0210 1210-0210 1310-0210 1410-0210 1510-0210 1610-0210 1690-02102.4 1110-0240 1210-0240 1310-0240 1410-0240 1510-0240 1610-0240 1690-02402.5 1110-0250 1210-0250 1310-0250 1410-0250 1510-0250 1610-0250 1690-02504.25 1110-0425 1210-0425 1310-0425 1410-0425 1510-0425 1610-0425 1690-04254.7 1110-0470 1210-0470 1310-0470 1410-0470 1510-0470 1610-0470 1690-04705.5 1110-0550 1210-0550 1310-0550 1410-0550 1510-0550 1610-0550 1690-05507.0 1110-0700 1210-0700 1310-0700 1410-0700 1510-0700 1610-0700 1690-07009.0 1110-0900 1210-0900 1310-0900 1410-0900 1510-0900 1610-0900 1690-090011.0 1110-1100 1210-1100 1310-1100 1410-1100 1510-1100 1610-1100 1690-110012.5 1110-1250 1210-1250 1310-1250 1410-1250 1510-1250 1610-1250 1690-125015.0 1110-1500 1210-1500 1310-1500 1410-1500 1510-1500 1610-1500 1690-150024.0 1110-2400 1210-2400 1310-2400 1410-2400 1510-2400 1610-2400 1690-240032.0 1110-3200 1210-3200 1310-3200 1410-3200 1510-3200 1610-3200 1690-3200


Retention in µm



Loading Capacity


151 0.7 274 25 Very High GF/F121 1.0 143 48 Very High GF/B131 1.0 88 78 Very High GF/C161 1.1 67 102 Very High 934-AH111 1.2 53 130 Very High GF/A141 3.1 19 350 Very High GF/D169 1.0 53 130 Very High 934-AH

18 Glass and Quartz Microfiber Filters

Filter Papers for TCLP Ahlstrom offers three microfiber glass grades for use in the toxicity characteristic leaching procedure (TCLP) as described in EPA Method 1311.

Grade 151 – Standard TCLP FilterThis high performance binder-free grade, described on page 17, is Ahlstrom’s standard recommendation for TCLP testing.

Grade 193 – Low Metal TCLP FilterThis grade has similar performance properties to Grade 151 and is made with acid-treated borosilicate glass microfibers with inherently low levels of barium and zinc. The filter media contains no binders or other additives that may cause interference with samples. The filters resist acids and bases and have a nominal particle retention of 0.7 µm.

Grade 26 – Pre-washed Low Metal TCLP FilterThis grade uses the same acid-treated glass microfiber media as Grade 193, which is then acid-washed using 1N HNO3, as described in EPA Method 1311. The filter media is thoroughly rinsed in a multi-stage process using copious amounts of high-purity deionized water. Prewashing with acid further reduces the content of metals to exceptionally low levels. This eliminates the need to acid-wash the filters in your lab, saving valuable time and reducing waste disposal and reagent costs.

Catalog numbers Size* Grade 193 Circles/Box Grade 26 Circles/Box

4.7 1930-0470 100 0260-0470 100

9.0 1930-0900 100 0260-0900 50

11.0 1930-1100 100 0260-1100 50

12.5 1930-1250 100 0260-1250 50

14.2 1930-1420 100 0260-1420 50

15.0 1930-1500 100 0260-1500 50

Typical levels of trace elements in Grade 26

Element mg/L

Ag 0.002

As 0.010

Ba 0.200

Cd 0.002

Cr 0.013

Hg 0.0005

Pb 0.006

Se 0.004

*All circle diameters are in centimeters.

Products for Suspended Solids AnalysisThis test for measuring solids in water calls for a glass filter disk without organic binder for some steps. After the filtering process, the filter retaining the solids from method B, C, or D is heated to 550°C in a muffle furnace and desiccated as necessary until measured weight is stable. Grade 169 meets the needs of both Standard Method 2540D: Total Suspended Solids and Standard Method 2540E: Volatile Suspended Solids.

Changes in the weight of the filter when heated to this temperature can affect the reliability of this test. Grade 169 is designed to maintain a stable weight at 550°C.

Any brittleness caused by the heat exposure can make the filter too difficult to handle and invalidate the test if pieces break off. Grade 169 exhibits similar handling characteristics before and after 30 minutes in a 600°C furnace.

Pre-weighed FiltersAhlstrom also offers a pre-washed and pre-weighed filter for determinationof suspended solids.

Each filter is washed and weighed following the procedures in the latest version of STM 2540. It comes in an aluminum pan with the weight printed on the side for ease of use.

Size* 169

2.1 1690-0210

2.4 1690-0240

2.5 1690-0250

4.25 1690-0425

4.7 1690-0470

5.5 1690-0550

7.0 1690-0700

9.0 1690-0900

11.0 1690-1100

12.5 1690-1250

15.0 1690-1500

24.0 1690-2400

32.0 1690-3200

Catalog numbers Grade 169 (100 circles/box)*All circle diameters are in centimeters.

Size * Pre-weighed

4.7 169W-0470

Catalog numbers Pre-weighed Filters (100 circles in pans/box)*All circle diameters are in centimeters.

Micro-Quartz Fiber Filters 19

Key features

— Made of extremely pure micro-quartz filters

— Binder-free

— Particularly suitable for low amounts of particles

— Conditioned by high temperature pre-heating

Size* MK 5 MK 360

2.5 0050-0250 3600-0250

3.7 0050-0370 3600-0370

4.5 0050-0450 3600-0450

4.7 0050-0470 3600-0470

5.0 0050-0500 3600-0500

9.0 0050-0900 3600-0900

10.2 0050-1020 3600-1020

14.2 0050-1420 3600-1420

15.0 0050-1500 3600-1500

50 circles/box

25 circles/box

Grade MK 5 MK 360

Basis Weight g/m2 85 85

Alkalinity µeq/g of filter 11.7 0

Particle retention 0.3 µm % 99.9996 99.9995

Max Temperature °C 500 900

Whatman Cross Reference QM-A QM-H

Pall Cross-Reference Tissuquartz™

25 sheets/pack MK 5 MK 360

8 in x 10 in Sheets 0050-0810 3600-0810

Catalog numbers *All circle diameters are in centimeters.

Typical grade properties

Grade MK 5Ahlstrom offers a new grade of high-purity binder-free quartz suitable for air monitoring applications in high temperatures and aggressive atmospheres or when low levels of trace elements are required. Grade MK 5 can be used up to 500°C.

Grade MK 360 This 100% quartz microfiber filter is available for applications requiring extremely low levels of trace elements or media that can withstand temperatures between 500°C and 900°C.

Micro-Quartz Fiber FiltersAhlstrom’s micro-quartz filters are useful for testing hot “stack” gases and for filtration when high purity media is required.

20 Chromatography, Electrophoresis and Blotting Paper

Chromatography, Electrophoresis and Blotting PaperAhlstrom manufactures a complete line of high quality chromatography, electrophoresis and blotting papers for use in gel transfer applications and chromatography techniques. These uniform, smooth, white sheets are the high purity, high quality, and high value standard. They are used in nucleic acid research such as Southern, Northern and Western blots, electroblotting and electrophoresis. Ahlstrom chromatography, electrophoresis and blotting papers are made from high purity and 100% FDA compliant alpha cotton cellulose, using ultra-pure RO water and contain no additives that could cause increased backgrounds or other interference in detection systems.

Key features

— Controlled absorption

— Uniform absorption

— Consistency across the sheet

— Lot-to-lot consistency

— High purity, no sizing or fillers

— Excellent wet-strength and handling

— No hard spots or density variations

— No airborne fibers

— Custom cut

— Bulk packaging

Chromatography, Electrophoresis and Blotting Paper 21

Ahlstrom Thin Papers Thin papers are 100% pure cotton grades that are used in chromatography techniques where solute loading is not heavy. Ahlstrom thin series papers are ideal for general separations and for use as spacers in gel transfer techniques.

Ahlstrom 601: 0.19 mm – 125 mm /30 min.This thin paper with medium flow rate is the world standard in paper chromatography. The smooth, uniform white surface provides good resolution. Ahlstrom 601 is also used as a gel drying support and as a spacer in capillary and electroblotting sandwiches.

Ahlstrom 642: 0.21 mm – 120 mm /30 min. This thin paper with a flow rate lower than Ahlstrom 601 offers higher resolution and is recommended for optical or radiometric scanning techniques.

Ahlstrom 631: 0.23 mm – 150 mm /30 min. This slightly thicker grade provides a faster flow rate than Ahlstrom 601. Ahlstrom 631 is recommended for routine chromatography when loading is relatively low. Also suitable for routine quality control applications where high levels of resolution are not required and speed is important.

Catalog numbers (100/box; items with grade numbers in bold are 50/box) *All sheet sizes are in centimeters; additional sizes available in sheets or rolls.

Size* 601 642 631 222 237 238 243 320

5 x 7.5 6018-0575 6428-0575 6318-0575 2228-0575 2378-0575 2388-0575 2438-0575 3208-0575

7 x 8 6018-0708 6428-0708 6318-0708 2228-0708 2378-0708 2388-0708 2438-0708 3208-0708

7 x 10 6018-0710 6428-0710 6318-0710 2228-0710 2378-0710 2388-0710 2438-0710 3208-0710

11 x 14 6018-1114 6428-1114 6318-1114 2228-1114 2378-1114 2388-1114 2438-1114 3208-1114

14 x 17 6018-1417 6428-1417 6318-1417 2228-1417 2378-1417 2388-1417 2438-1417 3208-1417

16 x 18 6018-1618 6428-1618 6318-1618 2228-1618 2378-1618 2388-1618 2438-1618 3208-1618

20 x 20 6018-2020 6428-2020 6318-2020 2228-2020 2378-2020 2388-2020 2438-2020 3208-2020

46 x 57 6018-4657 6428-4657 6318-4657 2228-4657 2378-4657 2388-4657 2438-4657 3208-4657


Thickness mm

Klemm 1/16th/min

Absorption Speed mm/30 min


601 0.19 13 125 1 CHR

642 0.21 12 120 2 CHR or 20 CHR

631 0.23 21 150 4 CHR

238 0.34 15 140 3MM CHR

237 0.42 18 150 3 CHR

222 0.83 33 220 31 ET CHR

243 0.95 21 180 17 CHR

320 2.48 48 240 —

Ahlstrom Thick Papers Thick papers are 100% cotton grades that are used in chromatography techniques where solutes are heavily loaded. Thick papers are ideal grades for electrophoresis techniques.

Ahlstrom 238: 0.34 mm – 140 mm /30 min.This medium thick paper is recommended for general chromatography applications. Ahlstrom 238 is also ideal for use as wicks in protein or nucleic acid blotting to provide a uniform flow of buffer through the gel to the transfer membrane in a blotting sandwich. This is our most widely used blotting paper. Ahlstrom 238 is also suited for electrophoresis and the separation of inorganic compounds and for use in removing gels from glass supports.

Ahlstrom 237: 0.42 mm – 150 mm /30 min.This medium thick paper is recommended for general applications with medium-heavy solute loading. Like Ahlstrom 238, this grade is ideal for use as wicks in protein or nucleic acid blotting to provide

a uniform flow of buffer through the gel to the transfer membrane in a blotting sandwich. Ahlstrom 237 is also suited for electrophoresis and the separation of inorganic compounds and for use in

Ahlstrom 222: 0.83 mm – 220 mm /30 min.This medium thick paper offers extremely high flow and is recommended for both electrophoresis of large molecules and as a blotter to complete the blotting sandwich in gel transfer applications. Ahlstrom 222 has a smooth and uniform texture which assures continuous contact of buffer from the chamber through the gel and transfer membrane to the opposite pole or weight.

Ahlstrom 243: 0.95 mm – 180 mm /30 min.This is one of the thicker grades in the Ahlstrom thick paper series. Ahlstrom 243 offers both moderately high flow and absorption and is recommended for chromatography of heavy solute loading.

Ahlstrom 320: 2.48 mm – 240 mm /30 min.This super thick grade is one of the thickest papers on the market. Ahlstrom 320 offers extremely high flow and is recommended both for electrophoresis of large molecules and as a blotter to complete the blotting sandwich in gel transfer applications. Ahlstrom 320 provides a smooth and uniform texture assuring continuous contact of buffer from the chamber through the gel and transfer membrane to the opposite pole or weight.

Ahlstrom RNA/DNA Blotting Papers All the above-mentioned grades are also used as RNA/DNA Blotting papers. These grades are necessary tools in molecular biology and biochemical research to insure the transfer of biomolecules from the separation gel on to the transfer membrane. Ahlstrom offers a complete range of blotting, wicking, drying and spacing materials for use in gel transfer applications.

22 Micro Filtration Membranes and Syringe Filters

Micro Filtration Membranes and Syringe Filters

Membranes

Membrane Type DescriptionChemical Compatibility

Maximum Operation Temperature Sterilization

Cellulose Acetate Low protein-binding, well suited for sterile filtration and clarification of aqueous solutions, nutrient media, buffers, and sera. They provide superior chemical resistance to alcohol and oil. These hydrophilic membranes offer excellent flow rates.

Resistant against aqueous solutions, pH 4-8, against most alcohols, oils and other organic solvents

180°C Autoclaving at 121°C or 134°C, dry heat, gamma radiation (25 kGY) or with ethylene oxide

Nylon (Polyamide) Membranes are hydrophilic and are widely used in both aqueous and organic solvent filtration applications. Well suited for sterilization and clarification of buffers and nutrient media with a low level of extractables.

Resistant to many solvents and alkali-solutions, pH range 3-14

100°C Autoclaving at 121°C or 134°C or with ethylene oxide

Polyether Sulfone PES membranes have a uniform pore structure with high mechanical stability and are chemically inert. PES offers excellent flow rates for critical filtration situations where high throughput is required with the lowest protein adsorption.

Resistant to some solvents and aggressive, aqueous solutions, pH 1-13

200°C Autoclaving at 121°C or 134°C, gamma radiation (25 kGY) or with ethylene oxide

PTFE Permanently hydrophobic filter material, very suitable for air and gas filtration. PTFE membranes are extremely resistant to aggressive solvents and acids and can be used to filter particulate from both liquid and gas samples.

Resistant to solvents, acids and bases

200°C Autoclaving at 121°C or 134°C or with ethylene oxide

Other sizes and variations of membranes and syringe filters may be available for special order. Please contact customer service for additional details.

Micro Filtration Membranes and Syringe Filters 23

Ahlstrom ReliaDisc™ Sterile Gridded Microbiological Monitor MembranesAhlstrom offers sterile gridded membranes packed individually for use in colony counting, particle testing, and microscopy.

Ahlstrom ReliaDisc™ Non-sterile Membrane Filtration MediaMembrane filters are surface micro filtration filters used to remove particulates on and near the surface of the filter matrix by mechanical means.

Ahlstrom ReliaPrep™ Sterile Syringe FiltersAhlstrom offers syringe filters for convenient filtration of small sample sizes through membranes. Sterile syringe filters are available for clarifying biological solutions, including cell culture media.

Ahlstrom ReliaPrep™ Non-Sterile Syringe FiltersAhlstrom offers syringe filters for convenient filtration of small sample sizes through membranes.

Catalog numbersMembrane Filter Diameter (mm) Pore Size (µm) Pack of 500

Cellulose Acetate 28 0.2 760503

28 0.45 760507

Nylon (Polyamide) 15 0.2 760541

15 0.45 760543

25 0.2 760531

25 0.45 760532

Polyether Sulfone 28 0.2 760534

28 0.45 760504

PTFE 4 0.2 760547

4 0.45 760545

15 0.2 760536

15 0.45 760510

25 0.2 760539

25 0.45 760512

Glass Fiber Prefilter 28 0.7 760529

Connectors: female luer lock inlet, male luer slip outlet. CA, PES, GF – MBS Housing; PTFE, Nylon – Polypropylene Housing

Catalog numbers Membrane Type Pore Size Grid Membrane Diameter (mm) Pack of 1000 Pack of 3x100 for Auto Dispenser

Cellulose Nitrate 0.45 µm White w/ black grid 47 760217 760219

Cellulose Nitrate 0.45 µm Black w/ white grid 47 760224

Catalog numbersMembrane Type Filter Diameter (mm) Pore size (µm) Pack of 100


Cellulose Nitrate 47 0.45 760210

Nylon (Polyamide) 47 0.45 760181

Catalog numbersMembrane Filter Diameter (mm) Pore size (µm) Pack of 50


28 0.45 760502

Polyether sulfone 28 0.2 760506

MGS Housing; Female luer lock inlet; Male luer lock outlet

Ahlstrom 7100: Cellulose thimbles Cellulose thimbles are high quality sample reservoirs for quality control, research, and analytical applications where solvent extraction of solids and semi-solids must be carried out. The use of a Soxhlet extractor provides a safe method of extraction with toxic and other noxious solvents. Ahlstrom cellulose extraction thimbles are recommended for applications including: determination of fats in food, analysis of lacquer and binder in paints, vitamin A and carotene extractions, extraction of organic compounds from reaction mixtures, polymer determination in polymer industry, quality management of components used in pharmaceutical formulations.Walls of cellulose thimbles are approximately 1.5 mm thick and have been found to perform satisfactorily in application requiring either a single or double wall thickness.

Ahlstrom ET/MG160: Micro-glass fiber thimbles Glass thimbles are used to sample dust particles and aerosols from gaseous streams in the analytical registration of environmental pollution and for Soxhlet extractions requiring solvents too aggressive for the cellulose thimbles.

Ahlstrom ET/MK360: Micro-quartz fiber thimbles Quartz thimbles are used for emission testing in high temperature environments. They can also be used for testing acidic gases which are not compatible with micro-glass fiber thimbles. Quartz meets the highest purity requirements due to the lowest possible heavy metal content.

Key features

— Made from high purity materials

— Consistent physical properties

— Available in a range of sizes

— Fit into popular automatic extraction systems

24 Specialty Products

Specialty ProductsAhlstrom offers specialty products for the scientific industry. Many products were designed alongside the researchers doing test development in order to provide the necessary performance characteristics.

Extraction thimbles Ahlstrom offers high purity extraction thimbles in cellulose for Soxhlet extractions and in glass and quartz for the analysis of environmental pollution. All extraction thimbles are hollow cylinders with a round bottom.

Specialty Products 25


Inner Diameter (mm)

Thimble Ext. Length (mm)

Wall Thickness (mm)

Ash Content %

Penetration % DOP (0.3 µm)

Temperature Resistance °C

7100 – ET/401 +0/ -3 ± 1 1.5 ± 0.5 < 0.1

ET/MG160 +0/ -3 ± 1 2 ± 0.5 <0.002 500 max

ET/MK360 +0/ -3 ± 1 2 ± 0.5 <0.002 900 max

Catalog numbers (25 thimbles/box) *All sizes are in millimeters. s Sizes available for special order only. Please contact customer service for details.

Size* Cellulose 7100 Glass ET/MG160 Quartz ET/MK360

10x50 s s

16x50 s s

19x90 s E160-1990 s

20x80 s

22x62 s

22x70 s

22x80 7100-2280 E160-2280 s

22x100 s

24x65 s

25x100 s s E360-2500

25x60 s s s

25x70 s

25x80 7100-2580 s

25x90 s

26x100 s s

26x60 7100-2660 s s

26x80 s s

27x70 s

27x80 s

28x22 s

28x60 s s

28x100 s s s

28x120 s

29x110 s

30x100 7100-3000 E160-3010 s

30x110 s

30x150 s

30x70 s s

30x77 s s s

30x80 7100-3080 s

30x95 s s

33x100 7100-3300

33x118 s

33x80 7100-3380 s

33x94 7100-3394 E160-3394 s

34x150 s

35x75 s

35x90 s

35x120 s

35x150 s s s

40x150 s s s

43x123 7100-4323 s E360-4323

43x125 s

48x145 s

53x145 s s

26 Specialty Products

pH Papers and Test Strips Ahlstrom offers a range of test papers for rapid determination of pH and other conditions. Universal pH indicator papers are stocked in a roll of 5m in a plastic case, a refill pack of 3 reels for that case, and in a box of 200 strips. pH test strips, which have small squares of paper, each prepared with a different indicator, are also available. Ahlstrom offers a larger selection of pH indicator papers and test strips for different pH ranges plus a selection of reagent papers for special order. Please contact customer service for additional details.

Catalog numbers

Roll of 5m Refill pack x3 Box of 200 Test Strip 100 per box

pH 0-14 - - - PHT1-0014

pH 1-14 PHR5-0114 PHR3-0114 PHB2-0114 -

pH 1-11 PHR5-0111 PHR3-0111 PHB2-0111 -

Polyshield® Fluid Barriers Ahlstrom’s Polyshield Fluid Barrier is a super absorbent, pure cellulose paper with an impermeable polyethylene backing that absorbs splatters and spills, and protects work areas from contamination and damage by toxic, infectious, corrosive, radioactive or staining materials. Polyshield’s smooth, firm surface does not inhibit stability of bottles or tubes, and allows recovery of dry spills. Liquid samples can be recovered by washing the absorbed spill from the inert surface with the appropriate buffer. Disposal is safe and easy and Polyshield ashes readily upon incineration.

Microwave Sample Pads For microwave technology systems, analyzing moisture and fat content in foods. Glass microfiber paper is used to support food product samples when they are dried, as this media will withstand higher temperatures. Ahlstrom grade 161, binder-free glass microfiber paper provides the consistency and precision required for accurate testing by Quality Control Laboratories. Sample Pads are available in sheets and circles.

Catalog numbers *50 sheets per pack

Size Grade 4002

46cm x 57cm Sheets* 4002-4657

46cm x 50m Roll 4002-4650

92cm x 50m Roll 4002-9250

Product sizes Bulk packaging available

Grade Sizes Available

161 11 x 11cm Sheets

161 9cm Circles

161 11cm Circles

Ahlstrom Distributor Brand Cross Reference Guide 27

Ahlstrom Distributor Brand Cross Reference Guide*Conversion tables are provided to guide you in selecting the Ahlstrom grade that is most closely equivalent to your current brand of filter paper. Please note that grade comparisons between manufacturers are approximations based upon generally accepted industry practices. No two grades from different manufacturers are exact matches in terms of physical properties. For additional assistance in interpreting cross-references, or if you need further data, please contact customer service.

Reeve-Angel to AhlstromReeve-Angel Grade Ahlstrom Grade

200 950

201 909

202 962

230 961

801 513

802 515

830 5 17

934-AH 161/169

Schleicher & Schuell to Ahlstrom

S&S Grade Ahlstrom Grade

GF30 161

GF50 161

GF52 111

GF53 121

GF55 151

22/2 237

402 950

404 1/2 562

410 1/2 562

470 222

551 8613

580 1/2 509

589/1 54

589/2 74

589/3 94

589/4 74

589/5 95

591 237

593 601

595 631

597 601

597L 1/2 509

598 238

602 610

604 631

605 550

740E 222

0856 962

0905 962

0860 909

903 226

0903 613

1505 55

1506 75

1507 95

1573 1/2 505

1574 909

1575 950

2040A,B 631

2043A 601

2043B 642

2045A,B 642

2316 238

2469 237

2555 1/2 509

2668 243

2727 320

3002 962

3003 909

5703 237

Sharkskin 992

Micro Filtration Systems to Ahlstrom

MFS Grade Ahlstrom Grade

1 631

2 601

3 74

4A 95

5A 75

5B 74

5C 94

131 642

232 642

235 610

GA-55 111

GB-140 121

GF-75 151

GD-120 141

GC-50 131

Machery-Nagel to Ahlstrom

Machery-Nagel Grade Ahlstrom Grade

220 8613

615 613

616 601

619 de 610

640 d 94

640 m 74

640 w 54

750 n 615

85/70 BF 161

GF-1 111

GF-2 121

GF-4 141

GF-5 151

Whatman to AhlstromWhatman Grade Ahlstrom Grade

1, 1CHR 601

2, 2 CHR, 20 CHR 642

2V 542

3, 3CHR 237

3MM 238

4, 4CHR 631

5 610

6 950

17CHR 243

31ETCHR 222

40 74

41 54

42 94

50 391

52 392

54 388

91 909

113 961

114 962

114V 562

540 75

541 55

542 95

551 8613

GF/A 111

GF/B 121

GF/C 131

GF/D 141

GF/F 151

Student Grade 613

BFC 180 226

Benchkote Polyshield 4002

TSS 161

934-AH 161/169

TCLP 151

1PS 480

QM-A MK5

QM-H MK360

Albet to Ahlstrom

Albet Grade Ahlstrom Grade

2040A 631

2040B 237

2043A 601

2043B 642

346G 238

FP1505 55

FP1506 75

FP1507 95

FP1573 55

FP1574 95

FP1575 75

FP589/1 54

FP589/3 94

FP589/5 74

FP591 237

FP593 642

FP595 601

FP602H 610

FP604 631

FPGF50 111

FPGF51 121

FPGF52 131

FPGF53 141

* The comparative data included herein is based on publicly available information and/or Ahlstrom’s analysis and THE COMPARATIVE GRADES ARE NOT REPRESENTED OR WARRANTED TO BE EXACT FUNCTIONAL OR PERFORMANCE EQUIVALENTS. All users must make their own comparisons and determinations as to the suitability of any products for their intended end-use.

VWR to AhlstromVWR Grade Ahlstrom Grade

161 161

410 610

413 613

415 615

454 54

474 74

494 94

617 617

691 111

693 131

Fisher Scientific to Ahlstrom

Fisher Grade Ahlstrom Grade

G4 131

G6 111

G8 141

P2 610

P4 642

P5 613

P8 631

P8 Crepe 962

Q2 94

Q5 74

Q8 54

Thick 238

Thin 601

© Ahlstrom Corporation 2016

DISCLAIMER: The information supplied in this document is for guidance only and should not be construed as a warranty. All implied warranties are expressly disclaimed, including without limitation any warranty of merchantability or fitness for use. All users of the material are responsible for ensuring that is suitable for their needs, environment and end use. All data is subject to change as Ahlstrom deems appropriate.

Ahlstrom provides innovative fiber-based materials with a function in everyday life. We are committed to growing and creating stakeholder value by proving the best performing sustainable fiber-based materials. Our products are used in everyday applications such as filters, medical fabrics, life science and diagnostics, wallcoverings, tapes, and food and beverage packaging. In 2015, Ahlstrom’s net sales amounted to EUR 1.1 billion. Our 3,300 employees serve customers in 22 countries. Ahlstrom’s share is quoted on the Nasdaq Helsinki. More information available at www.ahlstrom.com.

You’ll find our Distributor Brand Cross Reference Guide on the inside back cover.

Ahlstrom Contact Office

Learn more: www.ahlstrom.com

North America

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+1 800 326 1888 [email protected]

Customer Service +1 717 486 3438 [email protected]

Sales Office +1 770 650 2100 [email protected]

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+49 89 419 4380 [email protected]

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